18316725 has 48 divisors (see below), whose sum is σ = 34997760.
Its totient is φ = 8280000.
The previous prime is 18316693. The next prime is 18316729. The reversal of 18316725 is 52761381.
It is not a de Polignac number, because 18316725 - 25 = 18316693 is a prime.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (18316729) by changing a digit.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72850 + ... + 73100.
It is an arithmetic number, because the mean of its divisors is an integer number (729120).
Almost surely, 218316725 is an apocalyptic number.
18316725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.
It is an amenable number.
18316725 is a deficient number, since it is larger than the sum of its proper divisors (16681035).
18316725 is a wasteful number, since it uses less digits than its factorization.
18316725 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 410 (or 405 counting only the distinct ones).
The product of its digits is 10080, while the sum is 33.
The square root of 18316725 is about 4279.8043179566.
The cubic root of 18316725 is about 263.6023484201.
The spelling of 18316725 in words is "eighteen million, three hundred sixteen thousand, seven hundred twenty-five".